UM0285

Supported commands

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7.2.3

Stop command

The *stop command interrupts any acquisition session that has been started either with the

*start or *debug command.

7.2.4

Registers read

The *rAA command allows to read the content of the registers embedded inside the

LIS3LV02DL device mounted on the evaluation kit board. In details AA, expressed as

hexadecimal value and written lower-case, represents the address of the register to be read.

Once the read command is issued, the board will return RAAhDDh, where AA is the address

sent by the user and DD is the data present in that register.

As an example, to read the CTRL_REG1 the user shall issue the command *r20 which

returns, for example, R20hC7h.

7.2.5

Registers write

The *wAADD command allows to write the content of the registers embedded inside the

LIS3LV02DL device mounted on the evaluation kit board. In details AA and DD, expressed

as hexadecimal values and written lower-case, represent respectively the address of the

register and the data to be written. As an example, to write 0xC7 inside the CTRL_REG1 the

user shall issue the command *w20c7.

7.2.6

Single bit write

With this command it is possible to set/reset a single bit inside a given register. In details the

command *bwAA<0:7><0|1> requires to the user to specify the address AA of register in

which he/she wants to change the bit, with AA expressed as hexadecimal value and written

lower-case, followed by the position of the bit to be changed, integer between 0 and 7, and

the value, either 0 or 1, to be associated to the specified bit.

For example, to set to 1 the FS bit present inside the CTRL_REG2 the user shall issue the

command *bw2171.

7.2.7

Zon and Zoff

The Zon and Zoff commands are employed respectively to put into 3-state (i.e. high-

impedance) and to exit (i.e. normal mode) the SPI lines of the ST7-USB microcontroller

mounted on the evaluation kit. These commands allows to isolate the sensor mounted on

the board from the microprocessor in case any external control (from a different micro

mounted on a separate user board) is needed.

By default, when the kit is first turned on, the SPI lines are in 3-state mode and the user is

required to send the command *Zoff to allow the communication between the sensor and

the micro itself.

7.2.8

Device name

The *dev command retrieves the name of the device mounted on the evaluation kit

connected to the PC. For the EK3LV02DL the returned value is 3LV02DL.